There is wood pellet burner designed for UDS on eBay. The price is over US$400. and It burns wood pellet only
and Wood Pellet is more expensive than charcoal. Indeed the purpose of wood pellet burner is nothing but for LONG burning
By this fire box, you can refill charcoal, pellet, chips, chunks during normal smoking process
Charcoal is cheaper than pellet. You can add chips at right time for flavour
1.Basket is secured by 2 pieces of hitach
2.There is flange for better sealing
3.Perforated pipe distributes fresh air
4.Air Inlet can be adjusted by a valve
5.Optionally BBQ controller of QMaster-Lite, much stable temperature.
6.Charcoal for fire and wood chip for flavor, much cheaper than wood pellet
7.cheaper, reliable, stable than wood pellet burner
This is my new design.
I just made one sample to test
What do you think.